:root{--bg:#0b0f14;--fg:#e6edf3;--muted:#8b98a5;--accent:#4493f8;--border:#21262d}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}main{max-width:640px;margin:0 auto;padding:4rem 1.5rem}a{color:var(--accent)}label{display:block;margin-bottom:.25rem;color:var(--muted);font-size:.875rem}input{width:100%;padding:.6rem .75rem;margin-bottom:1rem;background:#0d1117;border:1px solid var(--border);border-radius:6px;color:var(--fg)}button,input{font-size:1rem}button{padding:.6rem 1rem;background:var(--accent);color:#fff;border:none;border-radius:6px;font-weight:600;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.error{color:#f85149;font-size:.875rem;margin-bottom:1rem}